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參數(shù)資料
| 型號(hào)： | LTC1320CS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | Octal Bus Transceivers/Registers With 3-State Outputs 24-SOIC 0 to 70 |
| 中文描述： | LINE TRANSCEIVER, PDSO18 |
| 封裝： | SO-18 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大小： | 213K |
| 代理商： | LTC1320CS |
6
LTC1320
U
S
A
Thermal Shutdown Protection
The LTC1320 includes a thermal shutdown circuit which
protects the part against prolonged shorts at the driver
outputs. If any driver output is shorted to another output
or to the power supply, the current will be initially limited
to 450mA max. The die temperature will rise to about
150
°
C, at which point the thermal shutdown circuit turns
off the driver outputs. When the die cools to about 130
°
C,
the outputs re-enable. If the shorted condition still exists,
the part will heat again and the cycle will repeat. When the
short is removed, the part will return to normal operation.
This oscillation occurs at about 10Hz and prevents the part
from being damaged by excessive power dissipation.
O
PPLICATI
U
U
Power Shutdown
The power shutdown feature of the LTC1320 is designed
primarily for battery-powered systems. When SD (pin 4)
is forced high, the part enters shutdown mode. In shut-
down, the supply current drops from 1.2mA to 30
μ
A typ.
The driver outputs are three-stated and the power to the
receivers is removed. The receiver outputs are not auto-
matically three-stated in shutdown, and can toggle errone-
ously due to feedthrough from the inputs. This can be
prevented by pulling RXEN high along with SD; this will
three-state the receiver outputs and prevent the genera-
tion of spurious data.
Supply Bypassing
The LTC1320 requires that both V
DD
and V
SS
are well
bypassed; data errors can result from inadequate bypass-
ing. Bypass capacitor values of 0.1
μ
F to 1
μ
F from V
DD
to
ground and from V
SS
to ground are adequate. Lead lengths
and trace lengths between the capacitors and the chip
should be short to minimize lead inductance.
U
S
A
O
PPLICATI
TYPICAL
Single 5V Supply
RS422 to RS562/RS562 to RS422 Converter
17
16
15
13
12
11
10
1
2
3
4
5
6
7
8
18
0.1
μ
F
5V
9
14
0.1
μ
F
DRIVER I/O
LTC1320 TA03
LTC1320
+
100
μ
F
LTC1046
LT1054
*
+
8
5
+
2
4
10
μ
F
2
μ
F
3
LOGIC I/O
5V
*LTC1046 GIVES 300
μ
A QUIESCENT
CURRENT WHEN LTC1320 IS SHUT DOWN
LT1054 PROVIDES HIGHER OUTPUT DRIVE
1N5817
15
6
13
16
17
3
4
5
11
10
18
0.1
μ
F
5V
9
14
LTC1320 TA04
8
2
12
7
1
LTC1320
0.1
μ
F
–5V
RS562 OUT
NC
NC
+
–
RS422 OUT
+
–
RS562 IN
RS422 IN
TXO
RXO
TXD
+
TXD
–
TXDEN
RXI
SD
RXEN
V
SS
RXD
–
RXD
+
RXDO
TXI
RXI
RXO
TXD
V
DD
GND
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| LTC1320CSW#TR | 功能描述:IC TXRX RS232/422 5V SGL 18SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,140 系列:AU 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):1/1 規(guī)程:CAN 電源電壓:5.3 V ~ 27 V 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:管件 其它名稱:935267940512AU5790D14AU5790D14-ND |
| LTC1321CN | 功能描述:IC TXRX RS232/RS485/EIA562 24DIP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
| LTC1321CN#PBF | 功能描述:IC TXRX RS232/RS485/EIA562 24DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
| LTC1321CNPBF | 制造商:Linear Technology 功能描述:LTC1321CNPBF |
| LTC1321CS | 制造商:Linear Technology 功能描述: |
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